Google IT -Bits and Bites - Week 6 - Set #2 - Intro to Troubleshooting and Future of Networking - The Cloud and IPv6 Q%A 100%

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Cloud Computing - ANSWER a new model in computing where large clusters of machines let us use the total resources available in a better way. Hardware Virtualization - ANSWER a core concept of how... cloud computing technologies work. It allows the concept of a physical machine and a logical machine to be abstracted away from each other Virtualization - ANSWER a single physical machine called a host could run many individual virtual instances called guests Hyperviser - ANSWER a piece of software that runs and manages virtual machines while also offering these guests a virtual operating platform that's indistinguishable from actual hardware. Public Cloud - ANSWER a large cluster of machines run by another company. Private Cloud - ANSWER a large cluster of machines (used by a single large corporation) run by another company; is generally physically hosted on its own premises Hybrid Cloud - ANSWER a term used to describe situations where companies might run things like their most sensitive proprietary technologies on a private cloud while entrusting their less sensitive servers to a public cloud Anything (or X) as a service (XaaS) - ANSWER refers to the delivery of anything as a service. It recognizes the vast number of products, tools and technologies that vendors now deliver to users as a service over a network -- typically the internet -- rather than provide locally or on-site within an enterprise. Infrastructure as a Service (IaaS) - ANSWER you shouldn't have to worry about building your own network or your own servers Platform as a Service (PaaS) - ANSWER a subset of cloud computing where a platform is provided for customers to run their services Software as a Service (SaaS) - ANSWER a subset of cloud computing where a platform is provided for customers to run their services; Gmail for Business from Google or Office 365 Outlook from Microsoft are great examples Cloud Storage System - ANSWER customer contracts a cloud storage provider to keep their data secure, accessible, and available benefits of cloud storage - ANSWER 1) eliminates need for purchase and upkeep of hard drives (whose components have frequent malfunctions); 2) easily duplicate your data across multiple sites because providers usually operate in lots of different geographic regions. (some are global) 3) protection against data loss (because of multiple servers across varying regions) 4) pay for exactly how much storage you're using instead of having a fixed amount like you would with local storage 5) better manage expenses because you are not paying for unexpected repairs, etc. 6) backing up smaller data (like photos from smart phones) IPv6 - ANSWER Internet Protocol version 6; the first 64 bits of IPv6 address is the network ID; the second 64 bits of IPv6 address is the host ID. any given IPv6 network has space for over 9 quintillion hosts. network engineers can split up their network for administrative purposes; . IPv6 subnetting uses CIDR notation to define a subnet mask against the network ID portion of an IPv6 address. IPv5 - ANSWER an experimental protocol that introduced the concept of connections. It never really saw wide adoption, and connection state was handled better later on by the transport layer and TCP Undecillion - ANSWER (1 followed by 36 zero's); an approximation of something this size is the total number of atoms that make up the entire planet Earth and every single thing Rules for shortening IPv6 addresses - ANSWER 1) You can remove any leading zeros from a group. 2) any number of consecutive groups composed of just zeros can be replaced with two colons. FFOO:: - ANSWER IPv6 addresses starting with these are used for multicast, which is a way of addressing groups of hosts all at once. FE80:: - ANSWER IPv6 addresses starting with these are used for link-local unicast Link-local unicast addresses - ANSWER allow for local network segment communications and are configured based upon a host's MAC address; The link-local address are used by an IPv6 host to receive their network configuration, which is a lot like how DHCP works. The host's MAC address is run through an algorithm to turn it from a 48-bit number into a unique 64-bit number. It's then inserted into the address's host ID 32-bit - ANSWER size of the number chosen to represent addresses for IPv4; around 4.2 billion individual addresses IPv4 are 32-bit binary numbers, written out in four octets of decimal numbers 128-bit - ANSWER size of the number chosen to represent IPv6 addresses; 39 digits long; IPv6 are 128-bit binary numbers, usually written out as 8 groups of 16 bits each. Each one of these groups is further made up of four hexadecimal numbers. Example of Shortening IPv6 address - ANSWER Original IPv6 address (example) 2001:0db8:0000:0000:0000:ff00:0012:3456 Apply Rule 1 - Remove all leading 0's 2001: db8: 0: 0: 0:ff00: 12:3456 Apply Rule 2 - replace ONLY the FIRST string of groups composed entirely of 0's with "::" 2001:db8::ff00:12:3456 (Final Address) IPv6 address that begins with 2001:0db8 - ANSWER addresses reserved for documentation and education, or for books and courses (over 18 quintillion addresses) IPv4 loopback address - ANSWER 127.0.0.1 IPv6 loopback address - ANSWER Original: 31 0's w [Show More]

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